/* -*- coding: utf-8 -*-
 *
 * 2775.cc:  No.2775 Nuisance Balls - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int K = 6;
const int ds[] = { 720, 360, 180, 30, 6, 1 };
const char cs[] = "CMSRo.";

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n;
  scanf("%d", &n);

  for (int i = 0; i < K; i++) {
    while (n >= ds[i]) {
      putchar(cs[i]);
      n -= ds[i];
    }
  }
  putchar('\n');
  
  return 0;
}